Xen users - Dec 2007 - Error: Not enough memory is available, and dom0 cannot be shrunk any further

Hi,

I compiled the xen-3.2 unstableand have booted successfully into dom0.

When I try to start a domU, it gives me an error:

[root@xx xx]# xm create -c /etc/xen/fedora.fc6.cse
Using config file "/etc/xen/fedora.fc6.cse"
Error: Not enough memory is available, and dom0 cannot be shrunk any further

xm list gives:

Name                                        ID   Mem VCPUs      State
Time(s)
Domain-0                                     0   932     1     r-----
94.2

/etc/xen/fedora.fc6.cse:

kernel = "/boot/vmlinuz-2.6.21-6.fc7xen"
ramdisk = "/boot/initrd-2.6.21-6.fc7xen.img"
root="/dev/sda1 ro"
memory = 128
name = "fedora.fc6"
vifs = [ '''' ]
dhcp = "dhcp"
disk = [''tap:aio://etc//xen//rpath.img,sda1,w'']
extra = "selinux=0 3"
access_control = [''policy=dept,label=CSE'']


Using the binaries of yum install xen kernel-xen I am able to start the
domain using the same config file.

Thanks,
Hayawardh


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> When I try to start a domU, it gives me an error:
>
> [root@xx xx]# xm create -c /etc/xen/fedora.fc6.cse
> Using config file "/etc/xen/fedora.fc6.cse"
> Error: Not enough memory is available, and dom0 cannot be shrunk any
> further
Usually this happens when you''re bumping against dom0''s low
memory limit.
This is set in /etc/xen/xend-config.sxp as something like
"dom0-min-mem".
What was that set to when you had problems?

You may find something interesting in the output /var/log/xend.log but I 
somewhat doubt it...

Another thing that''s worth noting is that I often recommend people
disable
automatic resizing of dom0''s memory (set dom0-min-mem to the special
value 0)
and set dom0''s memory footprint on the Xen commandline (dom0_mem=)
instead.
This means dom0 starts off the right size for your particular configuration 
and also that you won''t confuse dom0''s memory manager with the
shrinking.

Cheers,
Mark
> xm list gives:
>
> Name                                        ID   Mem VCPUs      State
> Time(s)
> Domain-0                                     0   932     1     r-----
> 94.2
>
> /etc/xen/fedora.fc6.cse:
>
> kernel = "/boot/vmlinuz-2.6.21-6.fc7xen"
> ramdisk = "/boot/initrd-2.6.21-6.fc7xen.img"
> root="/dev/sda1 ro"
> memory = 128
> name = "fedora.fc6"
> vifs = [ '''' ]
> dhcp = "dhcp"
> disk = [''tap:aio://etc//xen//rpath.img,sda1,w'']
> extra = "selinux=0 3"
> access_control = [''policy=dept,label=CSE'']
>
>
> Using the binaries of yum install xen kernel-xen I am able to start the
> domain using the same config file.
>
> Thanks,
> Hayawardh


-- 
Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!

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